Context is important. A pistol for teaching a beginner? Sure, but we need do know more, What is the end goal? What kind of aptitude does the student have toward mechanical devices? For example: I've had a few beginners that I would never start with an M9 and others that I would. (It's a tad complicated.)
So with that in mind: What is the setting for the narrative, what kind of character is the student, and WHY do they want to learn how to shoot?
ETA: You used the word 'nut', which conjures up all kinds of negative impressions. So, I'd like to know your motivations here.